Annals of Applied Biology (2003) 143, 111-119

N.A. Ryan, T. Deliopoulos, P. Jones and P.P.J. Haydock (2003)
Effects of a mixed-isolate mycorrhizal inoculum on the potato - potato cyst nematode interaction
Annals of Applied Biology 143 (1), 111-119
Abstract: Inoculation of microplants of potato cv. Golden Wonder with Vaminoc, a mycorrhizal inoculum of three arbuscular mycorrhizal fungi (Glomus spp.), resulted in an increase in in-sand hatch of Globodera pallida, but not G. rostochiensis, within 2 weeks. By this time, mycorrhized plants also supported a larger number of feeding nematodes of both PCN species (50% higher for G. rostochiensis) than did non-mycorrhized plants, with a higher proportion of the G.pallida population being fertilised females than for G. rostochiensis. After 12 weeks, the multiplication rate of G. rostochiensis on mycorrhized plants was significantly greater than on non-mycorrhized plants, whereas no such difference was observed for G. pallida. The principal component of PCN multiplication affected by mycorrhization was increased cyst number per plant from 6 to 12 weeks. Over this period, there was no increase in cyst number per plant for either PCN species on non-mycorrhized plants, whereas the value increased on mycorrhized plants for both G. rostochiensis (by almost 200%) and G. pallida (57%). Mycorrhization resulted in significant increases in the root and shoot dry weights of plants grown in the absence of PCN.Although mycorrhized plants carried a larger PCN burden than non-mycorrhized plants when grown on PCN-infested medium, as a result of the increased PCN multiplication rate, they produced larger root systems than did non-mycorrhized plants, suggesting increased tolerance to PCN of the mycorrhized plants, particularly to G. rostochiensis. Of morphological characters investigated in the absence of PCN, only stem height (increased) was significantly affected by mycorrhization. Colonisation by mycorrhizal fungi resulted in increased tuber yield both in the absence (significant increase) and presence (non significant) of PCN, as a result of increased tuber number per plant. These results are discussed in the light of the possible use of AMF as part of an integrated PCN management plan.
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Link to article at publishers website
Database assignments for author(s): Patrick P.J. Haydock, Thomas Deliopoulos

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Globodera rostochiensis	Potato (Solanum tuberosum)
	Globodera pallida	Potato (Solanum tuberosum)